SN Certified Technician

If this is a 96+, the TPS is not used in the same way as in prior model years. The value is re-learned on every start up. So the absolute TPS value doesn't matter as long as it's the same at closed throttle.

The maf value is jumping around quite a bit. One of the times when it wouldn't start I pulled the vacuum line off of the fuel pressure sensor and it started. 4.6 stroked to 4.75, 2.1 KB, 36lb injectors, 255lph pump with boost a pump, 75mm throttle body, 90mm Maf, KB cold air intake, 9.5:1 compression. All this besides the stroke and fuel pump was on the original motor when I blew it up. My guy I had make the tune said it doesn't have anything to do with the tune and has to be a vacuum leak. I can't find one though

SN Certified Technician

I'm waiting to borrow my neighbors scanner. The vacuum line coming off of the frps smells like fuel. Does this mean it is bad? If so could it be causing my idle problems?

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Ruptured FRPS diaphragm!! Smoking gun time. Yes this will cause problems. In short, the PCM will NOT have an accurate fuel pressure. Not to mention that the extra fuel will be drawn straight into the manifold.